Fix a warning.
Fix a warning.
seungrye/cppformat,mojoBrendan/fmt,blaquee/cppformat,alabuzhev/fmt,dean0x7d/cppformat,cppformat/cppformat,dean0x7d/cppformat,wangshijin/cppformat,nelson4722/cppformat,nelson4722/cppformat,Jopie64/cppformat,seungrye/cppformat,lightslife/cppformat,blaquee/cppformat,blaquee/cppformat,alabuzhev/fmt,lightslife/cppformat,cppformat/cppformat,Jopie64/cppformat,wangshijin/cppformat,cppformat/cppformat,mojoBrendan/fmt,Jopie64/cppformat,seungrye/cppformat,lightslife/cppformat,dean0x7d/cppformat,nelson4722/cppformat,mojoBrendan/fmt,wangshijin/cppformat,alabuzhev/fmt